General form of registration statement for all companies including face-amount certificate companies

Description of Organization and Business Operations - Additional Information (Detail)

v3.21.2
Description of Organization and Business Operations - Additional Information (Detail) - USD ($)
 9 Months Ended 12 Months Ended
Jun. 17, 2021
Mar. 02, 2021
Feb. 25, 2021
Jan. 18, 2021
Sep. 30, 2021
Dec. 31, 2020
Dec. 31, 2019
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]              
Proceeds from issuance of common stock           $ 0 $ 4,501,000
Common stock par or stated value per share             $ 0.0001
LEO HOLDINGS III CORP [Member]              
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]              
Share price   $ 10.00   $ 10.00      
Proceeds from issuance of IPO         $ 275,000,000    
Deferred underwriting commissions noncurrent   $ 9,625,000     9,625,000    
Proceeds from issuance of private placement         8,000,000    
Payment to acquire restricted investments   $ 275,000,000.0     $ 275,000,000    
Restricted investments term   185 days   185 days      
Percentage of public shares to be redeemed on non completion of business combination       100.00% 100.00%    
Lock in period for redemption of public shares after closing of IPO       24 months 24 months    
Dissolution Expense       $ 100,000 $ 100,000    
Minimum share price of the residual assets remaining available for distribution       $ 10.00 $ 10.00    
Amount available in operating bank account         $ 189,000    
Working Capital         483,000    
Proposed Business Combination [Member] | Longleaf Merger Sub, Inc and Local Bounti Corporation [Member] | Merger Agreement [Member] | LEO HOLDINGS III CORP [Member]              
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]              
Stock conversion basis one            
Common stock par or stated value per share $ 0.0001            
Proposed Business Combination [Member] | Longleaf Merger Sub, Inc and Local Bounti Corporation [Member] | Warrant Agreement [Member] | LEO HOLDINGS III CORP [Member]              
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]              
Class of warrant or right number of securites called by each warrant or right 1            
Exercise price of warrant $ 11.50            
Sponsor [Member] | LEO HOLDINGS III CORP [Member]              
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]              
Proceeds from unsecured and non-interest bearing promissory note         112,000    
Due to related parties current         0    
Founder Shares [Member] | Sponsor [Member] | LEO HOLDINGS III CORP [Member]              
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]              
Proceeds from issuance of common stock         $ 25,000    
Minimum [Member] | LEO HOLDINGS III CORP [Member]              
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]              
Percentage of fair market value of target business to asset held in trust account       80.00% 80.00%    
Net tangible assets required for consummation of business combination       $ 5,000,001 $ 5,000,001    
Percentage of redeeming shares of public shares without the company's prior written consent       15.00% 15.00%    
Minimum [Member] | Longleaf Merger Sub, Inc and Local Bounti Corporation [Member] | LEO HOLDINGS III CORP [Member]              
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]              
Percentage of voting interests acquired       50.00%      
Minimum [Member] | Definitive Agreement of Initial Business Combination [Member] | LEO HOLDINGS III CORP [Member]              
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]              
Percentage of voting interests acquired         50.00%    
Private Placement Warrants [Member] | LEO HOLDINGS III CORP [Member]              
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]              
Offering costs   $ 11,000          
Class of warrants and rights issued during the period   5,333,333   4,866,667      
Class of warrants and rights issued, price per warrant   $ 1.50   $ 1.50      
Proceeds from issuance of private placement   $ 8,000,000.0   $ 7,300,000      
Exercise price of warrant       $ 0.10 $ 0.10    
IPO [Member] | LEO HOLDINGS III CORP [Member]              
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]              
Stock issued during period shares     3,600,000 3,600,000      
Offering costs   15,800,000          
Deferred underwriting commissions noncurrent   $ 9,600,000   $ 8,400,000      
Over-Allotment Option [Member] | LEO HOLDINGS III CORP [Member]              
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]              
Stock issued during period shares   3,500,000          
Deferred underwriting commissions noncurrent       $ 9,700,000      
Over-Allotment Option [Member] | Private Placement Warrants [Member] | LEO HOLDINGS III CORP [Member]              
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]              
Class of warrants and rights issued during the period       5,346,667      
Proceeds from issuance of private placement       $ 8,000,000.0      
Class A Ordinary Shares [Member] | LEO HOLDINGS III CORP [Member]              
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]              
Proceeds from issuance of IPO         $ 275,000,000    
Stock conversion basis   one-fifth of one   one-fifth of one      
Common stock par or stated value per share       $ 0.0001 $ 0.0001    
Class A Ordinary Shares [Member] | Private Placement Warrants [Member] | LEO HOLDINGS III CORP [Member]              
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]              
Class of warrant or right number of securites called by each warrant or right       1 1    
Exercise price of warrant       $ 11.50 $ 11.50    
Class A Ordinary Shares [Member] | IPO [Member] | LEO HOLDINGS III CORP [Member]              
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]              
Stock issued during period shares   27,500,000   24,000,000      
Share price   $ 10.00   $ 10.00      
Proceeds from issuance of IPO   $ 275,000,000.0          
Class A Ordinary Shares [Member] | Over-Allotment Option [Member] | LEO HOLDINGS III CORP [Member]              
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]              
Stock issued during period shares   3,500,000   27,600,000      
Public Shares [Member] | LEO HOLDINGS III CORP [Member]              
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]              
Share price       $ 10.00 $ 10.00